Matlab find an element in matrix

hello, I have a matrix that has many elements and I would like to know if I have a specific element on it All my variables are symbolic at this point. I already used : [i,j] = find( x==q^2) the output: i =

     []

j =

     []

so whats this means? I Have it somewhere or not?

[Azzi Abdelmalek]

What is x?

Answer 1

[Azzi Abdelmalek]

syms q
x=[2*q q^2 5*q]
[i,j] = find(x==q^2)

The result is

i =
   1
j =
   2

Answer 2

[bio lim]

It means your matrix 'x' does not have an element that is equal to q^2.